Fuelling debate

From
Dennis Wort

In “Kicking the habit”, your feature on the hydrogen economy(25 November 2000, p 34),
you fail to answer a fundamental question: can it be guaranteed
that any hydrogen-fuelled car parked in a garage is totally leak-free?

It’s a vital concern. The gas is utterly odourless, but explosive when mixed
with air in any proportion from 5 to 95 per cent. Ask anyone who has used liquid
hydrogen in their laboratory.